One small piece of equipment that can have a huge impact on the quality of sound on the worship platform is the in-ear monitor. In-ear monitors can reduce stage volume and provide precise monitoring for individual mixes.
In-ear monitor systems are a great way to control stage volume and craft a better main mix.
There are three primary things that a good in-ear monitor system does:
Reduce the volume and acoustic energy on stage
Give the performer on stage control over their own monitor mix
Reduce microphone bleed and feedback problems